Remove IXFA_* interfaces.

xfa.gyp

 {
   "variables": {
     "pdf_enable_v8%": 1,
   },
   "target_defaults": {
     "defines": [
       "PDF_ENABLE_XFA",
     ],
     'msvs_disabled_warnings': [
       4005, 4018, 4146, 4333, 4345, 4267,
@@ skipping 21 matching lines @@
         'third_party/freetype/include/freetype',
       ],
       'defines' : [
         'FT2_BUILD_LIBRARY',
       ],
       "sources":[
         "xfa/include/fxfa/fxfa.h",
         "xfa/include/fxfa/fxfa_basic.h",
         "xfa/include/fxfa/fxfa_objectacc.h",
         "xfa/include/fxfa/fxfa_widget.h",
+        "xfa/include/fxfa/xfa_checksum.h",
+        "xfa/include/fxfa/xfa_ffapp.h",
+        "xfa/include/fxfa/xfa_ffdoc.h",
+        "xfa/include/fxfa/xfa_ffdochandler.h",
+        "xfa/include/fxfa/xfa_ffdocview.h",
+        "xfa/include/fxfa/xfa_ffpageview.h",
+        "xfa/include/fxfa/xfa_ffwidgethandler.h",
+        "xfa/include/fxfa/xfa_fontmgr.h",
+        "xfa/include/fxfa/xfa_rendercontext.h",
         "xfa/fde/css/fde_css.h",
         "xfa/fde/css/fde_csscache.cpp",
         "xfa/fde/css/fde_csscache.h",
         "xfa/fde/css/fde_cssdatatable.cpp",
         "xfa/fde/css/fde_cssdatatable.h",
         "xfa/fde/css/fde_cssdeclaration.cpp",
         "xfa/fde/css/fde_cssdeclaration.h",
         "xfa/fde/css/fde_cssstyleselector.cpp",
         "xfa/fde/css/fde_cssstyleselector.h",
         "xfa/fde/css/fde_cssstylesheet.cpp",
@@ skipping 489 matching lines @@
         "xfa/fxbarcode/BC_Dimension.h",
         "xfa/fxbarcode/BC_LuminanceSource.h",
         "xfa/fxbarcode/BC_Reader.h",
         "xfa/fxbarcode/BC_ResultPoint.h",
         "xfa/fxbarcode/BC_TwoDimWriter.h",
         "xfa/fxbarcode/BC_UtilCodingConvert.h",
         "xfa/fxbarcode/BC_UtilRSS.h",
         "xfa/fxbarcode/BC_Writer.h",
         "xfa/fxbarcode/utils.h",
         "xfa/fxfa/app/xfa_checksum.cpp",
-        "xfa/fxfa/app/xfa_checksum.h",
         "xfa/fxfa/app/xfa_ffapp.cpp",
-        "xfa/fxfa/app/xfa_ffapp.h",
         "xfa/fxfa/app/xfa_ffbarcode.cpp",
         "xfa/fxfa/app/xfa_ffbarcode.h",
         "xfa/fxfa/app/xfa_ffcheckbutton.cpp",
         "xfa/fxfa/app/xfa_ffcheckbutton.h",
         "xfa/fxfa/app/xfa_ffchoicelist.cpp",
         "xfa/fxfa/app/xfa_ffchoicelist.h",
         "xfa/fxfa/app/xfa_ffdoc.cpp",
-        "xfa/fxfa/app/xfa_ffdoc.h",
         "xfa/fxfa/app/xfa_ffdochandler.cpp",
-        "xfa/fxfa/app/xfa_ffdochandler.h",
         "xfa/fxfa/app/xfa_ffdocview.cpp",
-        "xfa/fxfa/app/xfa_ffdocview.h",
         "xfa/fxfa/app/xfa_ffdraw.cpp",
         "xfa/fxfa/app/xfa_ffdraw.h",
         "xfa/fxfa/app/xfa_ffexclgroup.cpp",
         "xfa/fxfa/app/xfa_ffexclgroup.h",
         "xfa/fxfa/app/xfa_fffield.cpp",
         "xfa/fxfa/app/xfa_fffield.h",
         "xfa/fxfa/app/xfa_ffimage.cpp",
         "xfa/fxfa/app/xfa_ffimage.h",
         "xfa/fxfa/app/xfa_ffimageedit.cpp",
         "xfa/fxfa/app/xfa_ffimageedit.h",
         "xfa/fxfa/app/xfa_ffnotify.cpp",
         "xfa/fxfa/app/xfa_ffnotify.h",
         "xfa/fxfa/app/xfa_ffpageview.cpp",
-        "xfa/fxfa/app/xfa_ffpageview.h",
         "xfa/fxfa/app/xfa_ffpath.cpp",
         "xfa/fxfa/app/xfa_ffpath.h",
         "xfa/fxfa/app/xfa_ffpushbutton.cpp",
         "xfa/fxfa/app/xfa_ffpushbutton.h",
         "xfa/fxfa/app/xfa_ffsignature.cpp",
         "xfa/fxfa/app/xfa_ffsignature.h",
         "xfa/fxfa/app/xfa_ffsubform.cpp",
         "xfa/fxfa/app/xfa_ffsubform.h",
         "xfa/fxfa/app/xfa_fftext.cpp",
         "xfa/fxfa/app/xfa_fftext.h",
         "xfa/fxfa/app/xfa_fftextedit.cpp",
         "xfa/fxfa/app/xfa_fftextedit.h",
         "xfa/fxfa/app/xfa_ffwidget.cpp",
         "xfa/fxfa/app/xfa_ffwidget.h",
         "xfa/fxfa/app/xfa_ffwidgetacc.cpp",
         "xfa/fxfa/app/xfa_ffwidgetacc.h",
         "xfa/fxfa/app/xfa_ffwidgethandler.cpp",
-        "xfa/fxfa/app/xfa_ffwidgethandler.h",
         "xfa/fxfa/app/xfa_fontmgr.cpp",
-        "xfa/fxfa/app/xfa_fontmgr.h",
         "xfa/fxfa/app/xfa_fwladapter.cpp",
         "xfa/fxfa/app/xfa_fwladapter.h",
         "xfa/fxfa/app/xfa_fwltheme.cpp",
         "xfa/fxfa/app/xfa_fwltheme.h",
         "xfa/fxfa/app/xfa_rendercontext.cpp",
-        "xfa/fxfa/app/xfa_rendercontext.h",
         "xfa/fxfa/app/xfa_textlayout.cpp",
         "xfa/fxfa/app/xfa_textlayout.h",
         "xfa/fxfa/fm2js/xfa_error.cpp",
         "xfa/fxfa/fm2js/xfa_error.h",
         "xfa/fxfa/fm2js/xfa_expression.cpp",
         "xfa/fxfa/fm2js/xfa_expression.h",
         "xfa/fxfa/fm2js/xfa_fm2jsapi.cpp",
         "xfa/fxfa/fm2js/xfa_fm2jsapi.h",
         "xfa/fxfa/fm2js/xfa_fm2jscontext.cpp",
         "xfa/fxfa/fm2js/xfa_fm2jscontext.h",
@@ skipping 127 matching lines @@
           "sources": [],
         }],
         ["OS == 'mac'", {
           "configurations": {},
           "sources": [],
         }],
       ]
     }
   ]
 }